DE19712700C2 - Four-stroke internal combustion engine with elliptical valve discs - Google Patents
Four-stroke internal combustion engine with elliptical valve discsInfo
- Publication number
- DE19712700C2 DE19712700C2 DE1997112700 DE19712700A DE19712700C2 DE 19712700 C2 DE19712700 C2 DE 19712700C2 DE 1997112700 DE1997112700 DE 1997112700 DE 19712700 A DE19712700 A DE 19712700A DE 19712700 C2 DE19712700 C2 DE 19712700C2
- Authority
- DE
- Germany
- Prior art keywords
- internal combustion
- combustion engine
- stroke internal
- valve
- valve discs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 4
- 230000007704 transition Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Lift Valve (AREA)
Description
Die Erfindung betrifft einen Viertakt-Verbrennungsmotor gemäß dem Oberbegriff des einzigen Patentanspruchs.The invention relates to a four-stroke internal combustion engine according to the preamble of the only one Claim.
Ein derartiger Motor ist aus der US 4.981.118 bekannt.Such a motor is known from US 4,981,118.
Bei der Herstellung eines elliptischen Ventiltellers ist es nicht schwierig, eine elliptische Bewegung des Werkzeugs mit einer richtigen geometrischen Form mechanisch zu erreichen. Dieses erreicht man durch die Verbindung zweier Drehbewegungen mit verschiedenen Gyrationsradien unter einem Winkel von 90° mit einer dritten Drehung. Bei der synchronen Bewegung aller drei Drehungen erhält man eine geometrische Ellipse. Bei asynchroner Drehung erhält man andere geometrische Formen. Die geometrischen Parameter der Ellipse hängen vom Verhältnis der Radien der anfänglichen Bewegungen ab.When manufacturing an elliptical valve plate, it is not difficult to make an elliptical movement of the To achieve the tool with a correct geometric shape mechanically. This can be achieved through the connection of two rotary movements with different gyration radii at an angle of 90 ° with a third turn. With the synchronous movement of all three rotations you get one geometric ellipse. Other geometrical shapes are obtained with asynchronous rotation. The Geometric parameters of the ellipse depend on the ratio of the radii of the initial movements from.
Beim Einschleifen des Ventils in den Sitz, um einen hermetischen Abschluß zu erhalten, gibt es keine besonderen Probleme. Das Einschleifen kann man durch Einführung eines rotierenden elastischen Elements mit Läpppaste zwischen Ventil und Ventilsitz verwirklichen. Eine Verbesserung des bekannten Ventiltellers strebt die vorliegende Erfindung mit dem Merkmal des kennzeichnenden Teils des Patentanspruchs an. Dadurch wird der erfindungsgemäßen Konstruktion eine Möglichkeit zur Erhaltung ihrer Arbeitsfähigkeit in dem ganzen Bereich der Arbeitstemperaturen des Motors gegeben. Dieser Bereich ist relativ groß: von -40°C (bei kaltem Start) bis über +100°C (bei Verbrennungsmotoren mit Luftkühlung).When grinding the valve into the seat to obtain a hermetic seal, there are none special problems. Grinding can be done by introducing a rotating elastic Realize elements with lapping paste between valve and valve seat. An improvement on the known Valve plates strives for the present invention with the feature of the characterizing part of the Claim to. As a result, the construction according to the invention becomes a possibility for maintenance given their ability to work in the entire range of engine operating temperatures. This The range is relatively large: from -40 ° C (with cold start) to over + 100 ° C (with internal combustion engines with Air cooling).
Gemäß der Erfindung hat die Dichtfläche des Ventiltellers verschiedene Winkelwerte an den Stellen der maximalen und minimalen Radien der Ellipse. Der Winkel der Schrägkante an der Stelle des maximalen Radius ist flacher als an der Stelle des minimalen Radius. Der Ventilsitzwinkel hat einen kontinuierlichen Übergang von einem Wert zum anderen. Das Verhältnis der Ventilsitzwinkel wird durch die geometrischen Parameter des Ventiltellers sowie durch den linearen thermischen Ausdehnungskoeffizienten des Materials, aus dem das Ventil hergestellt ist, bestimmt.According to the invention, the sealing surface of the valve plate has different angular values at the locations of the maximum and minimum radii of the ellipse. The angle of the bevel at the point of maximum Radius is flatter than at the point of the minimum radius. The valve seat angle has one continuous transition from one value to another. The ratio of the valve seat angle will by the geometric parameters of the valve plate and by the linear thermal Expansion coefficient of the material from which the valve is made.
Des weiteren können die im Zylinderkopf angebrachten Führungsbuchsen für die Ventilschäfte aus einem Matrial mit größerem linearen thermischen Ausdehnungskoeffizienten als bei einem traditionellen Gusseisen (für Buchsen) gefertigt sein. So kann man eine unerwünschte Deformation des Ventiltellers vermeiden, die beim Aufwärmen des Motors zu einer Undichtigkeit der Baugruppe (Ventil - Ventilsitz) führen kann. Das Ventil selbst kann eine Temperaturkompensationsaussteifung in Form einer Versteifungsrippe besitzen, die im großen Durchmesser der Ellipse verläuft (Fig. 4a und 4b) und das Ventil vor der Temperaturdeformation schützt.Furthermore, the guide bushes for the valve stems mounted in the cylinder head can be made from a material with a greater linear thermal expansion coefficient than with a traditional cast iron (for bushes). In this way one can avoid an undesired deformation of the valve plate, which can lead to a leak in the assembly (valve - valve seat) when the engine warms up. The valve itself can have a temperature compensation stiffening in the form of a stiffening rib which runs in the large diameter of the ellipse ( FIGS. 4a and 4b) and protects the valve from the temperature deformation.
Weitere Einzelheiten sind den Fig. 1 bis 4b zu entnehmen.Further details can be found in FIGS. 1 to 4b.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997112700 DE19712700C2 (en) | 1997-03-26 | 1997-03-26 | Four-stroke internal combustion engine with elliptical valve discs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997112700 DE19712700C2 (en) | 1997-03-26 | 1997-03-26 | Four-stroke internal combustion engine with elliptical valve discs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE19712700A1 DE19712700A1 (en) | 1998-12-03 |
| DE19712700C2 true DE19712700C2 (en) | 2000-05-11 |
Family
ID=7824689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1997112700 Expired - Fee Related DE19712700C2 (en) | 1997-03-26 | 1997-03-26 | Four-stroke internal combustion engine with elliptical valve discs |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19712700C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10009315A1 (en) * | 2000-02-26 | 2001-08-30 | Frank Schulmann | Segmented ball valve for IC engines has non-circular non-spherical valve plate |
| CN113404568B (en) * | 2021-08-19 | 2021-12-17 | 潍柴动力股份有限公司 | An integral intake valve, cylinder head and gas engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4981118A (en) * | 1990-04-12 | 1991-01-01 | Pierre Lefebvre | Poppet valve for internal combustion engine |
-
1997
- 1997-03-26 DE DE1997112700 patent/DE19712700C2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4981118A (en) * | 1990-04-12 | 1991-01-01 | Pierre Lefebvre | Poppet valve for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19712700A1 (en) | 1998-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2756482A1 (en) | TURBOCHARGER CONTROL ACTUATOR | |
| EP0017279A1 (en) | Two or more piece piston for internal combustion engines | |
| EP0240491B1 (en) | Rotary engine | |
| DE112017002489B4 (en) | Double crankshaft engine | |
| DE102018113050A1 (en) | WASTEGATE ARRANGEMENT, A TURBOCHARGER USING THE WASTEGATE ARRANGEMENT AND A PROCESS | |
| DE19712700C2 (en) | Four-stroke internal combustion engine with elliptical valve discs | |
| DE3406732A1 (en) | Operating process for reciprocating piston internal-combustion engines and combustion engine for this | |
| DE4432688A1 (en) | Rotary engine | |
| DE102014112193A1 (en) | Compressor cover with integrated EGR valve | |
| DE102007043585A1 (en) | Turbocharger arrangement for internal-combustion engine, has turbochargers with turbine housings arranged in turbines, where pressure side of one turbocharger is connected gas-prominently with annular gap of other turbocharger | |
| DE3688320T2 (en) | CHAMBER WITH CHANGEABLE HEAT INSULATION. | |
| DE2612041A1 (en) | ROTOR FOR ROTARY LISTON MACHINES | |
| DE2913418A1 (en) | Reciprocating IC engine, pump or compressor piston - has elliptic cross=section for running in elliptic-section cylinder | |
| DE883076C (en) | Piston ring for working pistons of two-stroke diesel engines | |
| DE19754197A1 (en) | Exhaust gas pressure charged internal combustion engine | |
| DE391180C (en) | Slide with sealing strips assembled to form a frame | |
| DE3145005A1 (en) | Two-stroke engine with rotary disc valve control | |
| DE719510C (en) | Rotary valve seal for internal combustion engines | |
| DE2404770A1 (en) | SEALING STRIP FOR RADIAL SEALS OF ROTARY PISTON POWER MACHINES | |
| DE826799C (en) | Air-cooled two-stroke internal combustion engine | |
| DE809117C (en) | Device for controlling the inlet of the crankcase wash pump of two-stroke engines | |
| DE3137979A1 (en) | Lever piston engine | |
| DD279523A1 (en) | cylinder head | |
| DE2234698A1 (en) | ROTARY PISTON ENGINE | |
| DE394718C (en) | Slide control for explosion and internal combustion engines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |